透明场景与JavaFX？

Question

我试图用JavaFX创建透明场景。我能够让它发挥作用的唯一方法是舞台风格也是透明的。有没有办法让场景透明而不使窗口装饰透明？

let mainStoryboardIpad : UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let initialViewControlleripad : UINavigationController = mainStoryboardIpad.instantiateViewController(withIdentifier: "initial") as! UINavigationController
self.window = UIWindow(frame: UIScreen.main.bounds)
self.window?.rootViewController = initialViewControlleripad
self.window?.makeKeyAndVisible()